# 元组（tuple）
# 有序
# 不可变的
# 任何类型
# tup1 = ("a", "cc", [1,2],1,False)
# # tup1[0] = 1
# tup1[2][0] = 3
# print(tup1)
#
# tup2 = ("x", "y")
# tup3

# # 小练习
# print("####欢迎使用用户检测系统####")
# lst1 = [("root", "123456"), ("admin", "admin")]
# user = input("请输入用户名：")
# passwd = input("请输入密码：")
# tup1 = (user, passwd)
#
# if tup1 in lst1:
#     print("登陆成功")
# else:
#     print("登陆失败")
#



